Gangnam Style most watched on YouTube

South Korean rapper PSY's Gangnam Style has become YouTube's most viewed video of all time.

YouTube said in a posting on its Trends blog that "Gangnam Style" had been viewed 805 million times as of Saturday afternoon (Sunday NZT), surpassing Justin Bieber's Baby, which has had 803 million views.

The blog says the "velocity of popularity for PSY's outlandish video is unprecedented".

PSY's video featuring his horseriding dance was posted on YouTube in July, while Baby was uploaded in February 2010.

PSY's video has become a global sensation, with many people around the world mimicking his Gangnam Style dance.

In their October meeting, UN Secretary-General Ban Ki-moon, a South Korean, joked that he had to relinquish his title as "the most famous Korean", and tried a few of PSY's dance moves.